But a senior BJP leader admitted the former deputy chief minister would spoil Choudhary’s chances.

“It has become difficult for Choudharyji,” he added.

A section of Congress leaders believes if the Ajsu chief eats into the BJP vote bank, it will provide a level-playing field for Sahay, who is facing a formidable challenge from the BJP.

Ajsu sources said couple of factors — political and personal — motivated the party to field Mahto from Ranchi.

Mahto is the MLA from Silli, which falls under the Ranchi parliamentary constituency. This apart, the Ajsu won the 2011 by-election held for the Hatia Assembly seat — also a part of the Ranchi parliamentary seat.

“Calculations are very straight. We are in a comfortable position in these Assembly constituencies. Mahto is a young leader with a clean image,” a party leader said.